docs: def handle(self, user, **options):
          """
          Import pages in JSON format.  When creating a page and the original
          author does not exist, use user as the new author.  User may be
          specified by username, id or email address.
          """
          monkeypatch_remove_pages_site_restrictions()
          user_model = get_user_model()
          for match in ('username', 'pk', 'email'):
              try:
                  u = user_model.objects.get(**{match: user})
                  break
              except (user_model.DoesNotExist, ValueError):
                  continue
          else:
              raise CommandError(_("User with username/id/email = '%s' not found")
                  % user)
  
          json = sys.stdin.read()
          errors, pages_created = json_to_pages(json, u)
          if errors:
              for e in errors:
                  sys.stderr.write(e + '\n')
              raise CommandError(_("Errors encountered while importing JSON"))
          for page, created, messages in pages_created:
              print((_("%s created.") if created else _("%s modified.")) % (
                  page.get_complete_slug()))
              for m in messages:
                  print(" - " + m)